<template>
  <div id="detail">
    <detail-nav-bar class="detail-nav" @titleClick="titleClick" ref="nav" />
    <scroll
      class="content"
      ref="scroll"
      :probe-type="3"
      @scroll="contentScroll"
    >
      <detail-swiper :top-images="topImages" />
      <detail-base-info :goods="goods" />
      <detail-shop-info :shop="shop" />
      <detail-goods-info :detail-info="detailInfo" @imageLoad="imageLoad" />
      <detail-param-info ref="params" :paramInfo="paramInfo" />
      <detail-comment-info ref="comment" :commentInfo="commentInfo" />
      <goods-list ref="recommend" :goods="recommends" />
    </scroll>
    <detail-bottom-bar @addCart="addToCart" />
    <back-top @click.native="backClick" v-show="isShowBackTop"></back-top>
  </div>
</template>

<script>
import DetailNavBar from "./childComps/DetailNavBar";
import DetailSwiper from "./childComps/DetailSwiper";
import DetailBaseInfo from "./childComps/DetailBaseInfo";
import DetailShopInfo from "./childComps/DetailShopInfo";
import DetailGoodsInfo from "./childComps/DetailGoodsInfo";
import DetailParamInfo from "./childComps/DetailParamInfo";
import DetailCommentInfo from "./childComps/DetailCommentInfo";
import DetailBottomBar from "./childComps/DetailBottomBar";

import {
  getDetail,
  Goods,
  Shop,
  GoodsParam,
  getRecommend,
} from "network/detail";

import { debounce } from "common/utils";
import { itemListenerMixin, backTopMixin } from "common/mixin";
import GoodsList from "components/content/goods/GoodsList";

import Scroll from "components/common/scroll/Scroll";

import { mapActions } from "vuex";
export default {
  name: "Detail",
  components: {
    DetailNavBar,
    DetailSwiper,
    DetailBaseInfo,
    DetailShopInfo,
    DetailGoodsInfo,
    DetailParamInfo,
    DetailCommentInfo,
    DetailBottomBar,
    GoodsList,
    Scroll,
  },
  mixins: [itemListenerMixin, backTopMixin],
  data() {
    return {
      iid: null,
      topImages: [],
      goods: {},
      shop: {},
      detailInfo: {},
      paramInfo: {},
      commentInfo: {},
      recommends: [],
      themeTopYs: [],
      getThemeTopY: null,
      currentIndex: null,
    };
  },
  created() {
    // 1.保存传入的iid
    this.iid = this.$route.params.iid;

    // 2.根据iid请求详情数据
    getDetail(this.iid).then((res) => {
      console.log(res);
      const data = res.result;
      //   1.获取顶部图片的轮播数据
      this.topImages = data.itemInfo.topImages;

      //   2.获取商品信息
      this.goods = new Goods(
        data.itemInfo,
        data.columns,
        data.shopInfo.services
      );

      // 3.创建店铺信息的对象
      this.shop = new Shop(data.shopInfo);

      // 4.保存商品的详情数据
      this.detailInfo = data.detailInfo;

      // 5.获取参数的信息
      this.paramInfo = new GoodsParam(
        data.itemParams.info,
        data.itemParams.rule
      );

      // 6.取出评论的信息
      if (data.rate.cRate !== 0) {
        this.commentInfo = data.rate.list[0];
      }
    });

    // 3.请求推荐数据
    getRecommend().then((res) => {
      this.recommends = res.data.list;
    });

    // 4.给getThemeTopY赋值
    this.getThemeTopY = debounce(() => {
      this.themeTopYs = [];
      this.themeTopYs.push(0);
      this.themeTopYs.push(this.$refs.params.$el.offsetTop);
      this.themeTopYs.push(this.$refs.comment.$el.offsetTop);
      this.themeTopYs.push(this.$refs.recommend.$el.offsetTop);
      this.themeTopYs.push(Number.MAX_VALUE);
      console.log(this.themeTopYs);
    }, 200);
  },
  methods: {
    ...mapActions(["addCart"]),
    imageLoad() {
      this.$refs.scroll.refresh();
      this.getThemeTopY();
    },
    titleClick(index) {
      this.$refs.scroll.scrollTo(0, -this.themeTopYs[index], 200);
    },
    contentScroll(position) {
      // 1.获取y值

      const positionY = -position.y;
      // console.log(positionY);
      // 2.positionY和主题中值进行对比
      let length = this.themeTopYs.length;
      for (let i = 0; i < length - 1; i++) {
        if (this.currentIndex !== i) {
          if (positionY >= this.themeTopYs[i]) {
            if (positionY < this.themeTopYs[i + 1]) {
              this.currentIndex = i;
              this.$refs.nav.currentIndex = this.currentIndex;
            }
          }
        }
      }

      // 3.判断BackTop是否显示
      this.isShowBackTop = -position.y > 1000;
    },
    addToCart() {
      // 1.获取购物车需要展示的信息
      const product = {};
      product.image = this.topImages[0];
      product.title = this.goods.title;
      product.desc = this.goods.desc;
      product.price = this.goods.realPrice;
      product.iid = this.iid;

      // 2.将商品添加到购物车
      // this.$store.dispatch("addCart", product).then((res) => {
      //   console.log(res);
      // });

      this.addCart(product).then((res) => {
        // console.log(res);
        this.$toast.show(res, 2000);
      });
    },
  },
  mounted() {
    // 混合了
  },
  destoryed() {
    // 2.取消全局事件的监听
    this.$bus.$off("itemImageLoad", this.itemImgListener);
  },
};
</script>

<style scoped>
#detail {
  position: relative;
  z-index: 9;
  height: 100vh;
  background-color: #fff;
}
.detail-nav {
  position: relative;
  /* z-index: 9; */
  background-color: #fff;
}
.content {
  overflow: hidden;
  position: absolute;
  top: 44px;
  bottom: 49px;
  left: 0;
  right: 0;
}
</style>